Details
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Bug
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Status: Confirmed (View Workflow)
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Major
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Resolution: Unresolved
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10.3.39, 10.6, 12.2.2
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Unexpected results
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Description
Summary
binlog_format=MIXED can produce primary/replica row divergence when an
AFTER INSERT trigger evaluates a stored function that writes two
AUTO_INCREMENT side-effect tables, one side-effect table has an FK to the
source table, and the transaction uses ROLLBACK TO SAVEPOINT before a later
witness insert.
Environment
- Product: MariaDB Server primary/replica replication
- Replication mode: file/position
- binlog_format: MIXED
- Observed affected versions: MariaDB 10.3, 10.6, 12.2
- Clean controls: MariaDB 10.3/10.6/12.2 with ROW; MySQL
5.6/5.7/8.0 with MIXED - Storage engine: InnoDB
Steps To Reproduce
1. Start a MariaDB primary/replica pair with binlog_format=MIXED.
2. Run the SQL in the Minimal Reproduction SQL section on the primary.
3. Wait for the replica to catch up.
4. Run this query on both primary and replica:
SELECT seq, src_id, frame_v, note |
FROM acl_repl_ai_func_min_frame |
ORDER BY seq; |
Minimal Reproduction SQL
-- MariaDB primary/replica repro. Configure binlog_format=MIXED.
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CREATE TABLE acl_repl_ai_func_min_src( |
id INT PRIMARY KEY, |
v INT NOT NULL, |
note VARCHAR(32) NOT NULL |
) ENGINE=InnoDB;
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CREATE TABLE acl_repl_ai_func_min_audit( |
seq INT AUTO_INCREMENT PRIMARY KEY, |
src_id INT NOT NULL, |
seen_v INT NOT NULL, |
note VARCHAR(32) NOT NULL, |
KEY acl_repl_ai_func_min_audit_src_idx(src_id), |
CONSTRAINT acl_repl_ai_func_min_audit_fk |
FOREIGN KEY(src_id) REFERENCES acl_repl_ai_func_min_src(id) |
ON UPDATE CASCADE ON DELETE CASCADE |
) ENGINE=InnoDB;
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CREATE TABLE acl_repl_ai_func_min_frame( |
seq INT AUTO_INCREMENT PRIMARY KEY, |
src_id INT NOT NULL, |
frame_v INT NOT NULL, |
note VARCHAR(64) NOT NULL |
) ENGINE=InnoDB;
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DELIMITER //
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CREATE FUNCTION acl_repl_ai_func_min_eval( |
p_src_id INT, |
p_seen_v INT, |
p_note VARCHAR(32) |
)
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RETURNS INT DETERMINISTIC MODIFIES SQL DATA |
BEGIN
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INSERT INTO acl_repl_ai_func_min_audit(src_id, seen_v, note) |
VALUES (p_src_id, p_seen_v, p_note); |
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INSERT INTO acl_repl_ai_func_min_frame(src_id, frame_v, note) |
VALUES (p_src_id, p_seen_v + 9000, CONCAT('func-', p_note)); |
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RETURN p_seen_v; |
END// |
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CREATE TRIGGER acl_repl_ai_func_min_ai |
AFTER INSERT ON acl_repl_ai_func_min_src |
FOR EACH ROW |
BEGIN
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SET @acl_repl_func_result = |
acl_repl_ai_func_min_eval(NEW.id, NEW.v, NEW.note);
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END// |
DELIMITER ;
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INSERT INTO acl_repl_ai_func_min_src(id, v, note) |
VALUES (1, 10, 'seed'); |
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START TRANSACTION; |
INSERT INTO acl_repl_ai_func_min_src(id, v, note) |
VALUES (2, 20, 'prefix'); |
SAVEPOINT acl_repl_ai_func_min_sp;
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INSERT INTO acl_repl_ai_func_min_src(id, v, note) |
VALUES (3, 30, 'suffix'); |
ROLLBACK TO SAVEPOINT acl_repl_ai_func_min_sp; |
COMMIT; |
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INSERT INTO acl_repl_ai_func_min_src(id, v, note) |
VALUES (4, 40, 'witness'); |
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SELECT seq, src_id, frame_v, note |
FROM acl_repl_ai_func_min_frame |
ORDER BY seq; |
Expected Result
The primary and replica should return the same committed rows.
Expected rows:
1, 1, 9010, func-seed
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2, 2, 9020, func-prefix
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4, 4, 9040, func-witness
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Actual Result
Primary:
1, 1, 9010, func-seed
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2, 2, 9020, func-prefix
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4, 4, 9040, func-witness
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Replica:
1, 1, 9010, func-seed
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2, 2, 9020, func-prefix
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3, 4, 9040, func-witness
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Separate Verification Request
Please verify this stored-function form separately from the stored-procedure form. Stored functions and stored procedures can use different unsafe-statement classification paths under mixed binary logging.
Attachments
Issue Links
- relates to
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- Confirmed
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- Confirmed
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- Confirmed
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- Confirmed
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